Steeb 4 A Modelling and XANES Study on the Structure of the Amorphous Fe90Z r10-Alloy P

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Volume 44 a Zeitschrift für Naturforschung 1989 I n h a l t s v e r z e i c h n is

N u m b e r 1 Original Communications

Moment of Inertia Influence on Ion-Molecule Reac

tion Rates

R. Schuster and W. S tille r 1 Fractal Behaviour of Amorphous Ni32Pd52P16 Stud

ied by SANS

M. Schaal, P. Lamparter, and S. Steeb 4 A Modelling and XANES Study on the Structure of

the Amorphous Fe90Z r10-Alloy

P. Kizler, P. Lamparter, and S. Steeb 7 Application of Maximum Entropy Method (MEM)

for Precise Determination of NQR Frequencies T. Eguchi, K. Mano, and N. Nakam ura 15 Absorption Spectrum of Mn2+ Ions Doped in Zinc

Thallium Sulphate Hexahydrate J. L. Rao, M. R. Reddy,

and S.V.J. Lakshman 19

Phase Transition Studies across Isotropic-Smectic A and Smectic A -Smectic F Phases in 90.4

D. M. Potukuchi, P. B. Rao, N. V. S. Rao,

and V.G. K. M. Pisipati 23

Electrical Characterization of La2_JCSr;(:C u04_J, Superconductors

G. Chiodelli, G. Campari-Viganö,

V. M assarotti, and G. F lo r 26 The Triply Determined Substitution Structure of

1,3.4-Thiadiazole by DRM Microwave Spectros

copy

O. L. Stiefvater 29

7gBr, 127I NQR of Diammoniumalkyl Halides and Piperazinium Halides. Crystal Structure of Piper- azinium Dibromide Monohydrate and Piper

azinium Monoiodide

J. Hartmann, Shi-Qi Dou, and Al. Weiss 41

An ESR Investigation of Synthetic Pyrite Crystals D. Siebert, J. Dahlem, S. Fiechter,

and A. H artm ann 59

Nitrogen Hyperfine Structure in the Rotational Spec

tra of 4-Pyridinecarbaldehyde and 3-Pyridine- carbaldehyde

D. Stryjewski, N. Heineking,

and H. D reizler 67

Structural Phase Transitions in Solid tert-Butylam- monium Nitrate as Studied by Differential Thermal Analysis and 'H-NMR

H. Ishida, T. Iwachido, N. Hayama, R. Ikeda, M. Hashimoto, and D. Nakamura 71 Higher Order Modes as Accuracy Limiting Factor in

Permittivity Measurements of High Lossy Fluids Using Transmission Techniques in the GHz Range A. R edhardt, H.-J. Steinhoff, J. S c h litte r, H.-J. Neumann, and G. Hess 75 Line Spectrum Emission of Eu-Activated ZnS

K. Kynev and V. Kuk 81

lxB-Quadrupole Hyperfine Structure in the Rota

tional Spectrum of Phenyldifluoroborane

K. Vormann and H. D reizler 84 Note

Thermionic Electron Emission of Tungsten Bronzes.

K0.30WO3 and Rb0 30WO3

F. Zocchi 87

Molecular c/±-value, Magnetic Susceptibility Aniso- tropy, and Deuterium Quadrupole Coupling Con

stant in Deuterodiacetylene O. B öttcher, N. Heineking,

M. A n d o lfatto , and D. H. S u tte r 89 The Dielectric Relaxation of Water on Addition of

Ethylene Carbonate and some Related Substances

M. Stockhausen and A. Lux 56

Structure Calculations on 1,3,4-Thiadiazole with Computer Programs

O. L. Stiefvater and H. D. Rudolph 95

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nhaltsverzeichnis VII Polarized Optical Absorption and Emission of Pt(ll)

Complexes: Single Crystal [Pt(o-phen)(en)]Cl2 • 2 H20

R. Schw arz and G. Gliemann 99 Further Properties of a Set of Symmetric Maxwellian

Equations

P. G ueret 106

NQR-NMR and Raman Study of a Structural Phase Transition in (NH4)2PbCl6

C. Dimitropoulos and J. P e lzl 109 A Model Study of Instabilities Present in the Mean-

Field Description and in Linearized Correlation Schemes

M. C. Böhm, G. Bubeck, and A. M. Oles 117 A Study of Anionic Motions in Solid Rubidium and Cesium Tetrachloroaurates(III) by Measuring the Temperature Dependence of Chlorine Nuclear Quadrupolar Relaxation Times

A. Ishikawa, T. Asaji, D. Nakamura,

and R. Ikeda 125

Extended Analysis of the Rotational Spectrum of HCCF

F. Rohwer, R. Hinze, and A. G uarnieri 131 Crystalline and Liquid Phases in the Systems

MeX 2 /Aniline/Water (Me = Ni, Co; X = N 0 3, C104)

M. M ahr, H. Paulus, and K. G. Weil 139 Crystal Structure of Bis(trimethyltin) Selenate Di-

hydrate and Rotational Tunnelling of the Methyl Groups

D. Zhang, M. Prager, Shi-Qi Dou,

and AI. Weiss 151

A Comment on the Chaotic Behaviour of van der Pol Equations with an External Periodic Excitation W.-H. Steeb. J. C. Huang, and Y. S. Gou 160 Notes

NMR Determination of the Fractal Geometry of Gels Around the Collapse Transition

R. Blinc. O. Jarh. A. Zidansek.

and A. Blinc 163

I

Transition to Chaos via Collapse of Two-Torus in the Belousov-Zhabotinsky Reaction

G. Baier and K. Wegmann 165

Hydrogen in Electrodynamics II. Mathematical Means

H. S a llh o fe r 167

Lattice Vibrations of the Cooperites PdO and PtS

G. K liche 169

Scattering of Slow Neutrons by Thorium (In German) W. Waschkowski, K. Knopf,

and L. Koester 173

X-Ray Emission and X-Ray Self-Absorption in the H igh-S uperconductor YBa2Cu30 6 9 and other Copper Oxides

F. Burgäzy, H. Jaeger, K. Schulze,

P. Lam parter. and S. Steeb 180 X-Ray Absorption Near Edge Structure (XANES)

Calculations for the Amorphous Fe80B20- and Ni80B2o-A11°ys

P. K izler. P. Lamparter, and S. Steeb 189 On the Insertion Reactions of CH2 (a 'A ^ into Some

Element-Hydrogen Bonds

M. Koch, F. Temps, R. Wagener.

and H. Gg. W agner 195

On the Phosphorescence of Benzologues of Furan.

Thiophene. Selenophene. and Tellurophene. A Systematic Study of the Intra-annular Internal Heavy-atom Effect

M. Zander and G. Kirsch 205

The Lowest-Temperature Phase Transition of the Mixed Crystal of (NH4)2(1 _x)K2xPb[Cu(N02)6]

and the Reorientation of Ammonium Ions in the Crystals

M. Mizuno, T. Asaji, and D. Nakamura 210 A Microwave Fourier Transform Spectrometer in the

Frequency Band From 26 to 40 GHz Ch. Keussen, N. Heineking,

and H. D reizler 215

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Inhaltsverzeichnis VII Riemann-Cartan Geometry of Trivializable Gauge

Fields

M. M attes and M. Sorg 222

MINDO/3 Investigation of the Structure of the Intra- molecularly Hydrogen Bonded Enol Forms of 2-Trifluoroacetylcycloalkanones

K.A.K. Ebraheem, S. T. Hamdi,

and A. R. Al-Derzi 239

Can Self-focusing of Intense Laser Beams Cause Bose-Einstein Condensation into a Superfluid State?

F. W interberg 243

Note

Mechanism of Energy Transfer in Collisional Activa

tion of Kiloelectron-Volt Macromolecular Ions E. Uggerud and P.J. D errick 245 Report

Temporal Behavior of the Breakdown of Supercon

ductivity

W. Buck and J. Parisi 247

An Electrolytically Generated, Localized Hole Center in Quartz

A. B. Vassilikou-Dova, K. Eftaxias,

and G. Lehmann 278

Flash Photolysis and ESR Studies on Hematoporphy- rin and Photofrin II in Polar and Microheterogene- ous Environment

R. Quint, R. M. Quint, N. Getoff, T. Gantchev,

and M. Shopova 283

Confirmation of the Electric Field Gradients at the Nitrogen Nuclei in N-Cyanomethanimine, CH2NCN, from Low-/ Rotational Transitions W. H. Stolze, D. H. S u tter,

and C. W entrup 291

FT-IR Absorption Spectra of Polycrystalline Pressed Sample of the Organic Metals and Su

perconductors a-, /i-(BEDT-TTF)2I3 and (BEDT-TTF), Cu(NCS)2

R. Zamboni, D. Schweitzer, H. J. K eller,

and C. Taliani 295

Monte Carlo Simulation of Electronic Excitation Migration and Trapping in Disordered Two- Component Systems. A Comparison with Analyti

cal Theories

S. Blonski and C. Bojarski 257 Normalization and Probability Densities for Wave-

functions of Quantum Fieldtheoretic Energy Equations

H. Stumpf 262

Minimization of the Energy and the Variance Using Correlated Wave-functions (In German)

H. Kleindienst, M. Wolpers,

and D. Filberg 269

On the Law of Equipartition for Translational Mo

tion of Excited Molecules in Equilibrium with Thermal Radiation

B. H. Lavenda and W. Figueiredo 273

Structural Phase Transitions and Ionic Motions in Pyridinium Hexachlorotellurate(IV), Hexachloro- stannate(IV), and Hexabromostannate(IV) Crys

tals as Studied by 'H NMR Y. Tai, T. Asaji, R. Ikeda,

and D. Nakamura 300

Photophysical Properties of Hematoporphyrin and Dihematoporphyrin Ether (Ester) in Homogeneous and Microheterogeneous Environments

G. K öhler, N. Getoff, M. Shopova,

and T. G antchev 307

The Diode Laser Spectrum of Iodine Fluoride (IF) in the Ground Electronic State

U. Magg, H. Birk, K. P. R. Nair,

and H. Jones 313

Tunable Diode Laser Spectra and Assignment of the 748 cm-1 Band of Propane

G. Gassler, B. Reissenauer,

and W. H ü ttn e r 316

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nhaltsverzeichnis VII Notes

An Improved Estimate of the "Attractive Region"

and Modelling of Fluctuation Spectra

H. Tasso 325

On Electromagnetic Spinors and Electron Theory

W. H. Inskeep 327

Fermi Gas Like Hypothesis for Fleischmann-Pons Experiment

O. E. Rössler, J. Becker, M. Hoffmann,

and W. N ad ler 329

I

Report

Infrared Spectroscopy with Laser Sidebands at Microwave Modulation Frequencies (In German) W. A. Kreiner, H. Prinz, and G. M agerl 330

Calculation of the Thermodynamic Solvent Isotope Effect for Ferrous and Ferric Ions in Water C. L. Kneifel, H. L. Friedman,

and M. D. Newton 385

An Anomalous Isotope Effect of 235U in U(IV)-U(VI) Chemical Exchange

Y. Fujii, M. Nomura, M. Okamoto, H. Onitsuka, F. Kawakami, and K. Takeda 395 A Theoretical Consideration on Uranium Isotope

Effects Observed in Chemical Uranium-235 En

richment Processes

T. Oi and H. Kakihana 399

Some Kinetic and Equilibrium Isotope Effects in the Isobutylphenone Enol and Enolate Ion System Y. Chiang, A. J. Kresge, and P. A. Walsh 406 Isotope Effects in Kinetic Enolate Formation from

2-Pentanone and 2-Pentanone-l,l.l-d3

L. Xie and W. H. Saunders, Jr. 413

Protium-Deuterium Fractionation Factors for Or

ganic Molecules Calculated From Vibrational Force Fields

V. J. Shiner. Jr. and T. E. Neumann 337 Application of Vapor Pressure Isotope Effect to the

Determination of Vibrational Anharmonicity in the Liquid Phase

K. Töth and G. Jancsö 355

Vapor Pressure Isotope Effects in Liquid and Solid Ammonia

T.-V. King, T. Oi, A. Popowicz,

K. Heinzinger, and T. Ishida 359 Some Measurements of H/D Polarizability Isotope

Effects Using Differential Refractometry

M. F. Smith and W. A. Van Hook 371 The Role of Isotope Fractionation Effects in Atmo

spheric Chemistry

C. M. Stevens and A. F. Wagner 376

Corner-Cutting Tunneling in Hydride Transfer Be

tween N A D + Analogues

M. M. Kreevoy and I.-S. Han Lee 418 Semiclassical and Quantum Mechanical Calculations

of Isotopic Kinetic Branching Ratios for the Reac

tion of 0 ( 3P) with HD

G. C. Lynch, P. H alvick, D. G. T ru h la r.

B. C. G a r r e tt, D. W. Schwenke,

and D. J. Kouri 427

New Evidence for Symmetry Dependent Isotope Ef

fects: O + CO Reaction

S. K. B h a tta c h a ry a and M. H. Thiemens 435 Deuterium Isotope Effects on the Presteady State

Burst of an Enzymatic Reaction

W. W. C lelan d 445

Prediction of Isotope Effects for Anticipated Inter

mediate Structures in the Course of Bacterial Denitrification

M. A. M orgenstern and R. L. Schowen 450 NMR Stratagems for the Study of Multiple Kinetic

Hydrogen Deuterium Isotope Effects of Proton

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Inhaltsverzeichnis VII Exchange. Example: Di-p-fluorophenylformami-

dine/THF

H.-H. Limbach, L. Meschede,

and G. Scherer 459

Calculation of the Melting Curves of some Alkali- halides with CsCl Structure and their Thermody

namic Properties along these Curves

S. Sh. Soulayman and A. H arfoush 513 Isotope Effects and Concerted Two-Hydron-Transfer

between Formamidine Molecules. A Theoretical Study using the Ab Initio STO-3G Potential Energy Surface

P. Svensson, N.-Ä. Bergman,

and P. A hlberg 473

Calculation of Equilibrium Isotope Effects in a Con- formationally Mobile Carbocation

M. Saunders, G. W. Cline,

and M. W olfsberg 480

Evaluation of Isotope Effects on Henry's Law Con

stants by a Molecular Dynamics Technique L. X. Dang, P. Bopp, and M. W olfsberg 485

Note

Deuterium Isotope Effects on the Silver Ion- Promoted Hydrolyses of S,S-Diethylacetals of p- Substituted Benzaldehydes

D. P. N. S a tc h e ll and R. S. S a tc h e ll 492

Ionization Energy and Level Shifts of Multiply Charged Ions in Nonideal Plasmas

W. Ebeling and K. Kilimann 519 Gaussian Approach to (1 + 1) Dimensional Solitons

at Finite Temperature

R. Roychoudhury and M. Sengupta 524 Quasi-Chemical Model for Liquid Li-Cd Alloys

L. C. Prasad and R. N. Singh 529 Characterization of Electrodeposited Molybdenum

Black Surface Coatings

K. S. Farmakis and I. G. Poulios 533 Application of a PC-Controlled MW-Spectrometer

for the Analysis of Ketene-D2 . Simultaneous Anal

ysis of Vibrational Excited States Using Microwave and Infrared Spectra

J. Doose, A. G uarnieri, W. Neustock, R.

Schwarz, F. W inther, and F. Hegelund 538 Internal Cation Mobilities in the Molten Binary Sys

tem (Na, NH4) N 0 3

T. Haibara, O. O daw ara, and I. Okada 551 N u m b e r 6

Original Communications

Structure of Amorphous (Co, Mn)76B24- and (Co, Mn)85B15-Alloys by Means of X-Ray- and Neutron-Diffraction

M. Heckele, P. Lamparter, S. Steeb,

and R. Bellissent 495

Hydrogen in Electrodynamics, III. The Hydrogen Spectrum

High Resolution Spektrum of the CH3NC v2 Funda

mental Band

M. W. M arkus, K. M. T. Yamada,

and G. Winnewisser 507

Rate of the Bromous Acid-Bromide Reaction Mea

sured in a Br2-HOBr Buffer System in Sulfuric Acid Solution

H.-D. F ö rsterling, S. M uränyi,

and H. Schreiber 555

The Liquid Phase of Superionic Conductors. MC Simulations of Molten Silver Iodide

C. M argheritis 567

Phase Correction in Microwave Fourier Transform Spectroscopy

N. Heineking and H. D reizler 573 Deuterium Nuclear Quadrupole Coupling in Deu-

tero-Isocyanic Acid

N. Heineking, M. C. L. G erry,

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VIII Inhaltsverzeichnis Structural Study of the Molten C a 0 -F e 20 3 System

by X-ray Diffraction

I.-K. Suh, K. Sugiyama, Y. Waseda,

and J. M. Toguri 580

A Computer Simulation Study of Supercooled Liquid and Amorphous-Solid Methanol

M. M archi and M. L. Klein 585 Relationships of the Polarisability with the Number

of Valence Electrons, the Total energy and the Sec

ond Hyperpolarisability of Methylbenzenes J. Waite and M. G. Papadopoulos 591

Improved Spectroscopic Constants for 14C 160 2 Ob

tained from the v3 Band

S. Dobos. G. Winnewisser, F. Kling,

and J. Mink 633

Infrared Spectra of 14C2H2 and 12C 14CH2: The v*

Band

S. Dobos, F. Kling, G. Winnewisser,

and G. K eresztury 640

On the Connection between Statical and Dynamical Chaos

M. S. El Naschie and S. A l A th el 645 Notes

Addendum to: The Infrared Spectrum of CS2 in the v3 Band Region

F. W inther 594

Local Structure and Okada's Empirical Relation for the Internal Mobility of Cations in Molten Alkali Nitrates

J. Habasaki 595

Proton Spin Relaxation in Reentrant Nematic Cyano- biphenyl Liquid Crystals

K. H. Schweikert and F. Noack 597 Triplet Exciton and Trap States in the Charge-Trans

fer Crystal Anthracene/Tetrachlorophthalic An

hydride (A/TCPA)

W. M ühle, J. K rzystek, J. U. von Schütz,

and H. C. W olf 610

The Change of Electrical Resistivity during the Reversible Reaction GdBrHv GdBrH2 (0.67 ^ a-^ 1.0)

W. Bauhofer, Hj. M attausch,

and A. Simon 625

Characteristic Relaxation Times of Low-temperature Semiconductor Breakdown Kinetics

J. Peinke. J. Parisi, U. Rau, W. Clauss,

and M. Weise 629

The Determination of Spin-Rotation and Spin-Spin Interaction Constants from the Microwave Spec

trum of Methane

P. W olf and W. S ta h l 651

14N Quadrupole Coupling in the Rotational Spectra of Cyclopropylamine and Cyclopropyl Cyanide O. B öttcher, N. Heineking,

and D. H. S u tte r 655

79-81 Br-, 127I-NQR, and Crystal Structure of Glycyl- 1-alanine Hydrobromide Monohydrate and Hy- droiodide Monohydrate

A. Kehrer. S.-Q. Dou. and A. Weiss 659 14N Nuclear Quadrupole Hyperfine Structure in the

Microwave Spectrum of Methyl Azide, CH3N3 N. Heineking and M. C. L. G erry 669 Ferroelectric Liquid Crystal Mixtures with Carbohy

drate Derivatives as Dopants

V. V ill. F. Fischer und J. Thiem 675 The Ground State Microwave Spectrum and Dipole

Moment of 2-Isocyano-Propane

M. K rüger and H. D reizler 680 On the Diabaticity of He2

A. M etropoulos 683

The Rotational Zeeman Effect of 1,2,4-Trifluoro- benzene

W. H. Stolze and D. H. S u tte r 687

Erratum 692

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Inhaltsverzeichnis N u m b e r 8

Derivation and Application of an Algorithm for the Numerical Calculation of the Local Orientation of Nematic Liquid Crystals

A. K ilian and S. Hess 693

A General Theorem for Complex Chemical Systems Amenable to the Horiuti Approach

V. T. Popa, M. O. Vlad, and E. Segal 704 On a Variable of the Quasi-particle Transformation of

the Hamiltonian of an Odd-Nucleus

D. Demirhan and F. Büyükkilic 707 EPR of V 02+ in K Ti0P04 Single Crystals

A. B. Vassilikou-Dova, S. Jansen, F. W allrafen,

and G. Lehmann 711

Hydrogen in Electrodynamics. IV. The Components of the Hydrogen Field

Submillimeter Wave Spectrum of HS34SH P. M ittle r, G. Winnewisser,

and K. M. T. Yamada 718

X-ray Structural Study of Ferromagnetic Vitreous 0.5 La0 7Sr0 3M n030.5 B20 3

E. M atsubara, Y. Waseda, K. Inomata,

and S. Hashimoto 723

Simplification of Rotational Spectra and Spectral Hole Burning by Selective Excitation Techniques in Microwave Fourier Transform Spectroscopy B. Vogelsanger and A. Bauder 726 Deuterium Quadrupole Coupling Constants in Deu-

terochloroacetylene

N. Heineking, M. A n d o lfatto , U. Keussen, A. Mues, and H. D reizler 735 XH NMR and Thermal Studies of CH3NH3Br in a

Metastable Solid Phase Newly Found above 483 K M. Tansho, D. Nakamura, and R. Ikeda 738 Self-Diffusion and Reorientation of Methylammonium Ions in (CH3NH3)2ZnCl4 Crystals as Studied by 'H-NM R

H. Ishida, T. Iwachido, N. Hayama, R. Ikeda, M. Terashima, and D. Nakamura 741

Internal Cation Mobilities in Molten (Na, Ag)N03 Remeasured by the Column Method

K. Ichioka, I. Okada, and A. Klemm 747 A Microwave Fourier Transform Spectrometer in the

Region from 4 to 6 GHz with Double Resonance Modulation

H. Ehrlichmann, J.-U. Grabow, H. D reizler, N. Heineking, R. Schwarz,

and U. Andresen 751

Mössbauer-Investigation of the Li2FeCl4 Polymorphs (In German)

H. D. Lutz, A. Pfitzner, W. Schmidt, E. Riedel,

and D. Prick 756

Notes

CdSe Photoanodes for Electrochemical Photovoltaic Conversion

K. Kochev, G. Popkirov, K. Ivanova, R. Quint,

and N. G etoff 759

Note on Algebraic Structure Count

J. R. Dias 761

Doubt on Experimental Evidence for a Superexchange- Mediated Primary Electron Transfer in Photosyn- thetic Reaction Centers

A. Ogrodnik and M. E. Michel-Beyerle 763 Report

A Formula Periodic Table for Benzenoid Hydrocar

bons and the Aufbau and Excised Internal Struc

ture Concepts in Benzenoid Enumerations

J. R. Dias 765

V II

Pars Orbital Method for Excited States

O. E. Polansky and W. M. F. Fabian 773 O Is Core Level Positions of Bi2Sr2CaCu20 8_x by

O Kj X-Ray Emission

F. Burgäzy, C. Politis, P. Lamparter, and

S. Steeb 780

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X Inhaltsverzeichnis VII Rotational Diffusion and Rheological Properties of

Liquid Crystals

M. A. Osipov and E. M. Terentjev 785 Bhatia-Young Model Calculations of the Thermody

namic Properties of TKEBS-Based Binary Liquid Mixtures

L. J. G allego, J. A. Somoza, and M. Silbert 793 A Lorentz Invariant Schrödinger Equation of Spin 0

E. Trübenbacher 801

The Effect of Deuteration on the Molecular Dipole Moments of Haloacetylenes

N. Heineking. U. Andresen, and

H. D reizler 848

Intramolecular Dipole Reorientation and Dielectric Loss of Microwaves and Submillimeterwaves in Di

luted Solution. V. Acetyle Compounds (In German)

G. Klages 853

Errata 866

Effect of Isotopic Exchange upon Symmetry Depen

dent Fractionation in the O + CO -> C 0 2 Reaction S. K. B h a tta c h a ry a and M. H. Thiemens 811 Anomalous X-ray Scattering on Amorphous

Al87Y8Ni5 and A190Y10 Alloys

E. M atsubara, Y. Waseda, A. Inoue, H. O htera,

and T. Masumoto 814

Dipole-Dipole Transport opf Excitation in Liquid Solutions: Influence of Multi-Stage Energy Transfer on Donor Photoluminescence Yield

J. Kusba 821

Conductivity and Magnetic Properties of the Charge- Transfer Complex from N,N'-Dicyanonaphtho- quinonediimine (DCCNNI) and Tetrathiafulvalene (TTF)

H.-P. Werner. W. G rauf, J. U. von Schütz, H. C. Wolf, H. W. Helberg, W. Kremer, A. Aumüller, and S. Hünig 825 Nitrogen and Deuterium Hyperfine Structure in the

Rotational Spectrum of Morpholine J.-U. Grabow, H. Ehrlichmann, and

H. D reizler 833

14N- and D-Hyperfine Structure in the Rotational Spectrum of Pyrrolidine

N u m b er 10

H. Ehrlichmann. J.-U. Grabow, and

H. D reizler 837

Nitrogen and Deuterium Hyperfine Structure in the Rotational Spectrum of Piperidine

H. Ehrlichmann, J.-U. Grabow, H. D reizler, N. Heineking. and M. A n d o lfatto 841

Report

Comets: A Key to Solar System Formation

H. U. K e lle r 867

Original Communication Dust in the Solar System

H. Fechtig 877

Reports

Geochemical Constraints on the Early Thermal His

tory of the Earth

M. J. Drake 883

The Earth-Moon Connection

A. E. Ringwood 891

Planetary Compositions - Clues from Meteorites and Asteroids

E. R. D. S co tt and H. E. Newsom 924 Noble Gas Record of Japanese Chondrites

N. Takaoka, M. Shima,

and F. Wakabayashi 935

Study Butte: A Chaotic Chondrite Breccia with Nor

mal H-Group Chemistry

K. Fredriksson, E. Jarosewich,

and F. W lotzka 945

Xenon in Chondritic Metal

K. M arti, J. S. Kim, B. Lavielle, P. Pellas,

and C. Perron 963

(9)

Inhaltsverzeichnis The Trace Element Chemistry of the Metal in IAB

Iron Meteorites

J. W. Larimer and E. R. Rambaldi 968 Labile Trace Elements in Some Antarctic Carbona

ceous Chondrites: Antarctic and Non-Antarctic Meteorite Comparisons

R. L. P aul and M. E. Lipschutz 979 Allende Xenolith AF: Undisturbed Record of Con

densation and Aggregation of Matter in the Solar Nebula

G. K u ra t, H. Palme, F. B ra n d stä tte r,

and J. H uth 988

Chemical Composition of an Unusual Xenolith of the Allende Meteorite

H. Palme, G. K u ra t, B. Spettel,

and A. Burghele 1005

Allende Whole Rock and CAI Studies: Thermal Equi

libration History and Noble Metal (Redistribu

tions in Mineral Phases

S. Jovanovic and G. W. Reed, Jr. 1015

On the Validity of Macroscopic Models

W. Kerner, D. Pfirsch, and H. W eitzner 1029 Axisymmetric Dynamo Solutions

D. L o rtz 1041

Evidence of Chaotic Hierarchy in a Semiconductor Experiment

J. Parisi, J. Peinke, R. P. Huebener, R. Stoop,

and M. Duong-van 1046

QED-Based on Self-Fields: A Relativistic Calculation of g-2

A. O. B aru t and J. P. Dowling 1051 Electronic Spectra of Single-Crystal Maleonitriledi-

thiolate Complexes of Iridium (I): [Ir(CO)2mnt]

TBA (mntee[S2C2(CN)2]2"; TBA = [(C4H9)4N]+) U. Riedl and G. Gliemann 1057

The Molecular Zeeman Effect of Imines. I. Methani- mine, its Molecular g-Tensor, its Magnetic Suscep

tibility Anisotropics, its Molecular Electric Quad

ru p le Moment, its Electric Field Gradient at the Nitrogen Nucleus, and its Nitrogen Spin-Rotation Coupling

H. Krause, D. H. S u tte r,

and M. H. Palmer 1063

Resolution of the 14N Nuclear Quadrupole Hyperfine Structure in the Rotational Spectrum of Hydrazoic Acid, HN3, and Evaluation of the Rotational Con

stants of H 15NNN and HN N15N

M. C. L. G erry, N. Heineking, H. Mäder,

Methyl Nitrate, its Molecular ^-Values, Magnetic Susceptibility Anisotropics, Molecular Electric Quadrupole Moment, Second Moments of the Electronic Charge Distribution, and Electric Field Gradient at the Nitrogen Nucleus

J. Spieckermann and D. H. S u tte r 1087 Algebraic Studies of Kekule Structures. A Semilattice

Based on the Sextet Rotation Concept I. Gutman, A. V. Teodorovic,

and N. Kolakovic 1097

Structural Phase Transitions in [(C2H5)4N]3Sb2Br9 and [(C2H 5)4N]3Bi2Br9

J. Zaleski, R. Jakubas, Z. Galewski,

and L. Sobczyk 1102

Dynamical Instabilities in a Diffusion Layer G. Baier, P. Urban, and K. Wegmann 1107 Structural Phase Transitions and Cationic Motions

in Pyridinium Dichloroiodate (I) as Studied by XH NMR, Differential Thermal Analysis, and Pow

der X-Ray Diffraction

R. W atanabe, T. Asaji, Y. Furukaw a,

D. Nakamura, and R. Ikeda 1111 The Intra-annular Internal Heavy-atom Effect on the

Fluorescence and Phosphorescence Properties of Oxygen, Sulphur or Selenium Containing Hetero

cyclic Systems Related to Dibenzo[b, n]perylene

M. Zander 1116

Investigation of the Reaction of Naphthalene with 0 ( 3P) in the Gas Phase

H. Frerichs, R. Koch, M. Tappe,

and H. Gg. W agner 1119

VII

(10)

XII Inhaltsverzeichnis Cationic Dynamics in the Crystalline Phases of

(CH3NH3)PbX3 (X: CL Br) as Studied by Proton Magnetic Resonance Techniques

Y. Furukaw a and D. Nakamura 1122

YBa2Cu30 7_ v: Transport Properties and Defects at High Temperature

G. Chiodelli, G. Campari-Vigano'.

and G. F lo r 1167

Liquid Crystalline Norcholesterylesters: Influence of the Axial Methylgroups on the Phase Transitions and the Cholesteric Helix

H. Stegemeyer, K. Siemensmeyer, W. SucRowt,

and L. Appel 1127

Self-Exchange Velocities in Molten (Li, Na, K)C1 of the Eutectic Composition Reflecting the Chemla Effect for the Internal Mobilities

A. Endoh and I. Okada 1131

Note

Large-A^ Expansion for a Nucleon-Nucleon Potential F. Büyükkilic and D. Demirhan 1137

A New Evaluation of DSC-curves of Binary Mixtures and the Phase Diagrams of Some Methylchloro- silanes with Lutidine (In German)

K. Hensen and M. Dräbing 1172 Deuteron Magnetic Resonance (DMR) - Study on

CD3NH3HgCl3

M. Körper, R. Kind, and H. Fuess 1177 Double Spin Echo Volume Selective NMR Spectros

copy with a 1.5 T Whole Body Imager

W.-I. Jung and O. Lutz 1183

The Microwave Spectrum and Nuclear Quadrupole Coupling Constants of HNC1 O

M.C. L. Gerry, S.J. Howard, N. Heineking,

Resonance Transition of the Spatial Correlation Fac

tor of Self-Generated Oscillations in the Postbreak- down Regime of p-Ge

E. Schöll, H. Naber. J. Parisi. B. R öhricht,

J. Peinke, and S. Uba 1139

Substratum Interpretation of the Sagnac- and the Aharonov-Bohm Effect

F. W interberg 1145

Magnetic Field Distribution Measurement by the Modified FLASH Method

J. Weis. I. F ro llo , and L. Budinsky 1151 Chaotic and Periodic Motions of Satellites in Elliptic

Orbits

B. P. Koch and B. Bruhn 1155

The Effect of Substituents on the Polarity in the First Excited Singlet State of Some trans-Styryl-Methyl- Sul fones

A. Kawski, A. Kubicki. and J. Czajko 1163

11 Boron Quadrupole Hyperfine Structure in the Rota

tional Spectrum of Hydroxydifluoroborane K. Vormann and H. D reizler 1191 High Resolution Microwave Spectra of Pyridine-N-

oxide and a-Picoline-N-oxide

N. Heineking, H. D reizler, K. Endo,

and Y. Kamura 1196

Atomic Structure of Amorphous Fe-Tb- and Amor

phous Fe-Co-Tb-Alloys by Means of EDXD R. U tz, A. Brunsch, P. Lamparter,

and S. Steeb 1201

Self Diffusion in Compressed Fluid CF3Br and CF3C1

M. Has and H.-D. Lüdemann 1210 Ion Dip Spectrum of the Fluorobenzene-Argon van

der Waals Complex in a Supersonic Jet H. Bader. O. Krätschm ar. H. L. Selzle,

and E. W. Schlag 1215

Laser Tandem Mass Spectrometry in a Time of Flight Instrument

R. Weinkauf, K. W alter, C. W eickhardt, U. Boesl. and E.W. Schlag 1219

(11)

Inhaltsverzeichnis Studies on Molecular Motions and Phase Transition

in Pyridinium Tetrachloroiodate (III) Crystals by the Measurements of the Temperature Dependen

ces of Chlorine Nuclear Quadrupole. Resonance Frequencies and Relaxation Times

A. Ishikawa, T. Asaji, and D. Nakamura 1226 Ionic Conductivity in the poly(propylene glycol)-

poly(methyl methacrylate)-LiCF3S 0 3 System P. a . svantesson, I. albinsson,

and B.-E. M ellander 1231

Relativistic Ground and Excited State Energies of a /1-Particle in Hypernuclei Using Woods-Saxon Potentials

C. G. K outroulos 1234

XIII

Subject Index 1239

Authors Index 1245